@Hn39
Nothing in the presentation is in conflict with my position that the certified Vs1g for the A320 was determined in accordance with the Special Conditions for type certification of the A320: in normal law as designed for the production airplane except with alpha-prot disengaged. Additional tests were conducted with modified or degraded control laws to demonstrate stall characteristics and to obtain aerodynamic data beyond alpha-max (and probably beyond cLmax) for design purposes and for the flight simulator data package.
That makes sense. Those additional tests (with an increased alphamax so that it didn't interfere with the testing) would have come first to establish what alphamax might be and the certification tests then completed up to that alphamax/Vs1g as you suggest.